This year, we at the Crocs-Side-Scripting CTF team took part in the hxp CTF 2021 . It was another challenging CTF with hard challenges. This post contains our solutions to the four challenges we solved (Log 4 sanity check#, gipfel#, kipferl# and infinity# as well as a note on the solution to zipfel#. We came in at a respectable 34th place, which was an improvement from last years position. Hoping for top 20 next year!

This year I took part in the hxp ctf with a bunch of friends from and around the CRoCS lab. Our team Crocs-Side-Scripting finished at the 58th place. As this was our first CTF and my first real CTF, I quite like the outcome and enjoyed the experience. This post outlines our solution to the crypto hyper challenge, which focuses on Hyperelliptic curves.